JPH0242702Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field: The present invention relates to a lightweight and small-sized construction lift that is installed along a framework scaffold.

Conventional technology: Conventionally, various types of lifts have been used at construction sites, and small lifts are required in places where lift installation space is limited, such as in narrow work sites or renovation work of existing buildings. . Even with such a small lift, there has been a need for one that is easy to handle and has a high degree of safety.

To this end, a rack and pinion drive type has been proposed in place of the conventional wire rope drive type and is now in practical use. However, even with this rack and pinion drive type, the rack of cutting teeth requires a sophisticated structure in order to ensure that the gear meshing with the gear always meshes correctly, and it requires a lot of trouble for repairs and inspections. It takes. Also,
In the pin rack type, inspection and maintenance are troublesome to maintain the correct meshing pitch, and vibration is also generated during meshing, which is undesirable as it causes noise.

Purpose of the invention: The present invention was developed in view of the above situation, and it is a simple and compact rolling interlocking type lift that can be installed vertically along a framework scaffold, making effective use of the narrow installation space. It is about providing.

Structure of the invention: In the present invention, a support body made by integrally framing two parallel pillars/guide rails at appropriate intervals with horizontal members at multiple locations can be successively added to the required length, The horizontal member is used to support the frame scaffolding, and the front side of the support is fixed to the side surface of the horizontal member at a position shifted to one side from the center line, and one side is open. A rolling mesh type rack gear is attached with the meshing part facing sideways,
In the front part of the support body, there is an elevating frame formed so as to be guided up and down by abutting guide rollers from the rear side and outside at the upper part and from the front side at the lower position with respect to the guide rail. , a receiving frame that is appropriately assembled and protruded from the front lower part of the elevating frame, a loading platform placed on the receiving frame, and a roller mounted inside the receiving frame that meshes with the rack gear attached to the support. It is equipped with a carrier consisting of a dynamic meshing impeller and its driver.

In the present invention, the impeller for driving the lift of the carrier has meshing rollers attached to the front surface of the rotary plate body at a circular pitch corresponding to the pitch of the rack gear, and the face plate of the impeller faces the open front side of the rack gear attached to the support. , the teeth of the rack gear and the roller are interlocked with each other. Note that a guide side plate is attached behind the meshing part of the rack gear, and the receiving rollers are brought into contact with the guide side plate at locations that are appropriately spaced vertically from the meshing position with the impeller, and the connection between the impeller and the rack gear is maintained. This was done to maintain the engagement.

Embodiment: Hereinafter, one embodiment of the lift of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 to 4, the support 1 includes guide rails 2 and 2' made of two steel pipes standing upright in parallel at appropriate intervals, and a plurality of horizontal members 3 arranged at appropriate pitches in the vertical direction. It has a framework structure that is connected together. At this time, the guide rails 2, 2' and the horizontal member 3
is joined by the outside between the rails 2 and the vertical rib,
The installation space is kept to a minimum by connecting the guide rollers (described later) so as not to interfere with contact with them. The horizontal member 3 is provided with an attachment portion 3' for a support 4, and the support 4 allows the framework scaffold A to
It is connected and supported by the erected structure. It should be noted that the length of this support body 1 is made constant, and it is constructed so that it can be added to the length one by one. On the front surface of this support 1, there are toothed portions 5' which are bent from a steel plate into an approximately circular arc shape on both upper and lower surfaces, and which are offset from the longitudinal center toward one of the guide rails 2 at the required pitch. A rack gear 5 is mounted sideways toward the side guide rail 2, with the front side open, and the mounting surface and the rear surface of the tooth portion are integrally formed with an angle-shaped member 5''.

A carrier 10 is mounted on the front part of the support 1 so as to be movable up and down. This carrier 10 is constructed by connecting parallel vertical members with a width wider than the interval between the guide rails 2 and 2' of the support body 1 with horizontal members at the top and bottom, and has both upper and lower ends facing the guide rail (in the rear direction). ) protruding bracket 12,
12', the upper bracket 12 has an hourglass-shaped guide roller 13 on the rear side of the guide rails 2, 2', and the lower bracket 12' has an hourglass-shaped guide roller 13 on the rear side of the guide rails 2, 2'. on the front side of
Side guide rollers 14 are provided on the outside of the upper part, and auxiliary rollers 15, 1 are provided opposite to the guide rollers 13, 13, respectively.
5 are provided at opposite positions across the rail, and can be raised and lowered freely, and this lifting frame 11
a drive machine support frame 16 protruding from the front lower part of the
A reduction drive device 17 housed and mounted within the support frame 16
It consists of a rotary impeller 18 driven by a rotary impeller 18, and a loading platform 20 attached to the upper surface of this support frame 16.

A drive impeller 18 protruding from the top of the drive support frame 16 toward the support body 1 is attached to the output shaft of the worm gear reducer 7, and the pitch of the rack gear 5 attached to the support body 1 and the circumferential pitch are the same. It is a rotating body in which a plurality of meshing rollers 18' are distributed at matching positions and attached to one side of the face plate 18'', so that at least one meshing roller 18' is always in contact with the tooth surface of the rack gear 8 and rollingly meshes with the tooth surface of the rack gear 8. The support frame 16
The meshing roller 18' is inserted from the open side into the rack gear 5 that is attached to the front surface of the support 1 from the side, and the support frame is attached to the rear side plate 5a of the rack gear 5 to maintain this meshing. 16
The receiving rollers 19, 19 protruding from the base are brought into contact with each other.

The loading platform 20 has pillars 21 erected at its four corners, and is supported by the pillars 21 and attached to an enclosure that becomes a footboard 22 so that it can be raised and lowered.

Auxiliary roller 1 that guides and supports the lifting frame 11
5 and 15 are detachably attached to the brackets 12 and 12'. Further, a support frame 24 is attached to the front surface of the lifting frame 11 in a removable manner so that a long object can be lifted and lowered while supporting it.

With this structure, at a work site, the support 1 is erected on the scaffolding framework A, connected and supported by the supports 4 at three horizontal members. This support body 1 is set upright at a required height by sequentially adding segments that are longer than at least the height of the elevating frame 11 of the carrier 10.

The joint portion of the support body 1 is connected by fitting with the guide rails 2 and 2' having a pipe structure. The base of the support body 1 is attached and fixed on a base 6 installed on the ground surface or the like.

In addition, when mounting the carrier 10 on the support 1, at the initial stage of erecting the support 1,
Both the upper and lower guide rollers 13, 13 of YY are brought into contact with the guide rails 2, 2' at predetermined positions, and the auxiliary rollers 15, 15 are installed at positions facing the respective guide rollers 13, 13 so as to sandwich the guide rails. Allocate to. During this assembly, support 1
Since the front surface of the rack gear 5 attached to the side is open, the rotary impeller 18 for driving the lift of the carrier 10 remains attached to the output shaft of the reducer 17, and its meshing roller 18' is connected to the rack gear 5.
It can be assembled by meshing with the toothed portion 5'.

When driving up and down, the driving rotary impeller 18 mounted on the carrier 10 meshes with the rack gear 5 attached laterally along the front surface of the support 1 in a state parallel to the support 1. , the meshing dimensions that are a problem in easy gear meshing drives,
Outer guide rollers 14, 14 and both upper and lower guide rollers 1 closest to the support side and attached to the outer frame vertical members 11', 11' in the lifting frame 11
3 and 13, the elevating frame 11 is supported along the support 1, so that only the elevating driving force acts effectively on the meshing drive section, and in combination with the rolling meshing drive, stability is achieved. high and allows for smooth operation.

When loading and unloading cargo onto the loading platform 20,
Safety during work can be measured by folding down the stepping board 22 serving as an enclosure and passing it between it and the scaffolding floor of the work floor.

Effects of the invention: The lift of the invention has a simple structure with a wide guide rail made of steel pipes constituting the support, and a rack gear with a rolling mesh structure that is installed in an open manner along the support. By interlocking with the open-structured impeller, it is possible to move up and down easily, and the overall structure is compact, easy to assemble, and it is small and lightweight, so it can be easily installed even in narrow spaces. It has the convenience of being able to be assembled and disassembled. Furthermore, since the drive section is simply formed, it is easy to assemble and disassemble, and the structure is lightweight and can be provided at low cost.

[Brief explanation of the drawing]

Figure 1 is a front view of the lift of the present invention, and Figure 2 is a front view of the lift of the present invention.
The right side view in the figure, Figure 3 is a plan view of the main parts of the lifting drive,
FIG. 4 is a diagram showing the relationship between the rack gear and the rotary impeller of the lifting drive section. 1... Support body, 2, 2'... Guide rail, 3
...Horizontal member, 4...Support, 5...Rack gear, 5'...Tooth portion, 10...Carrier, 11...Elevating frame, 12, 12'...Bracket, 13...
...Guide roller, 14...Side guide roller,
15... Auxiliary guide roller, 18... Rotating impeller, 18'... Engagement roller, 18''... Face plate, 20
...Cargo platform, 22...Treadboard.

Claims (1)

[Scope of utility model registration request] A support body is constructed by connecting two parallel steel pipe guide rails at appropriate intervals with horizontal members at multiple points, and can be successively added to the required length, and the horizontal members are supported and erected on the scaffolding using supports. On the front surface of the support body, a rolling mesh type rack gear with the front side surface open and fixed to the side surface of the horizontal member is installed with the meshing part facing sideways. , with respect to the guide rail, from the rear and outside at the upper position, and from the front at the lower position,
An elevating frame that is movable up and down by abutting guide rollers, a receiving frame that is appropriately assembled and protruding from the front lower part of the elevating frame, a loading platform placed on the receiving frame, and a receiving frame that is placed on the receiving frame. A carrier is equipped with a rolling meshing impeller and its deceleration drive device, in which a meshing roller is inserted from the front side and meshes with the rack gear teeth mounted on the support body and is connected to the rolling meshing impeller for rotation. A small lift for construction use that is characterized by: